Re-booting Oblivion the other day got me thinking, the Mysticism was removed from Skyrim to simplify things. But the lore explanation is that spells aren't naturally part of "schools." Just categorized under such by mages. After the oblivion crisis and the dissolution of the mages guild, the term (and usage) of Mysticism fell out of use. Practicing mages considered its spells to be part of the other schools and the term was dropped.
However TESO is set before the oblivion crisis, wouldn't that mean that mysticism was still a official "school" of magic?
If TESO was to introduce new (or old) spell types i would be happy to see the return of one of my favorite schools, what about you?